<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <!-- <script src="./01-ts初体验.js"></script>
    <a href="javascript:;">测试</a> -->
    <script>
      // let x = 'c'
      // const obj = {
      //   'a': 1,
      //   ['b']: 2, // b: 2
      //   [x]: 3, // c: 3
      // }

      function fn() {
        console.log(arguments.callee) //返回当前函数自身
      }
      fn()
    </script>
  </body>
</html>
